triple monitor setups are b*tchin'..... quad seems too much. However, I can't wait until we have six-monitor support with a chair that has a protracting keyboard that turns based on the movement of the mouse.
Nvidia's Kepler GTX 680: Powering the Next Gen
Quicker, quieter, and more power efficient, the GTX 680 is new "world's fastest" GPU.
At GDC 2011, Epic Games (maker of Gears of War) unveiled Samaritan, an eye-popping technical demo that showed what was possible with Unreal Engine 3 and a seriously hardcore PC. It was--and still is--an impressive demo, showcasing smoothly tessellated facial features, point light reflections, and judicious use of movie-style bokeh. The demo was so impressive that Epic decided to show it again at this year's GDC, with vice president Mark Rein reiterating that Samaritan is its vision for the next generation--a "screw you" to the naysayers predicting that graphical prowess will play second fiddle to features and functionality.
The problem was, Samaritan didn't exactly run on your average gaming PC, requiring three Nvidia GTX 580 GPUs at a cost of thousands of dollars, as well as a power supply that brought Greenpeace members out in a cold sweat. And this left us wondering: if it took so much power to run the demo, what chance would the next generation of console and PC gamers have to experience it?
The answer, it turns out, was also unveiled at this year's GDC in the form of Nvidia's brand-new GTX 680 GPU, a single one of which easily powers the Samaritan demo. Aside from a few optimisations from Epic, most of that comes down to the new 28nm Kepler architecture that the 680 is based on. It features a new Streaming Multiprocessor (SMX) design, GPU Boost, new FX and TX Anti-aliasing (FXAA/TXAA) technology, Adaptive VSync, support for up to four monitors (including 3D Vision Surround), and--most interestingly of all--much reduced power consumption with an increased focus on performance per watt.
Multiple acronyms aside, just what do you get if you plump down your hard-earned cash for a GTX 680? Quite a bit as it goes: 1536 CUDA Cores, 128 Texture Units, 32 ROP Units, 1Ghz Base Clock, 2GB GDDR5 RAM @ 6Ghz, 128.8 GigaTexels/sec Filtering Rate, 28nm Fabrication, 2x Dual Link DVI, 1x HDMI, 1x DisplayPort, 2x 6-pin Power Connectors, and a 195 Watt TDP.
Based on specs alone, the 680 is a more powerful beast than its predecessor, but it's also more practical too. The four display outputs mean you can drive four monitors (at up to 4K 3840x2160 resolution!) at once from a single card. That goes for 3D vision surround, meaning you don't have to splurge on an SLI setup if you're into giving yourself a headache. Also notable is the reduced power consumption of the card, which has a TDP of 195 Watts, compared to 250 Watts in a GTX 580, meaning you only need two six-pin connectors, and you can run it from a much smaller power supply.
"Clearly, the 680 is a more powerful beast than its predecessor, but it's also more practical too."
The reduced TDP also results in reduced heat, meaning it's easier to keep cool. The reference card has an all-new cooling setup that's much kinder on your ears; a godsend for anyone that ever had to endure the jet engine sounds of the GTX 400 series. It features special acoustic dampening material around the fan, a triple heat pipe design, and a redesigned fin stack that has been shaped for better airflow. Of course, this being a reference card, you can expect manufacturers to come up with their own crazy cooling solutions once they start shipping 680s.
Another neat feature of the 680 is a new hardware-based H.264 video encoder called NVENC. If you've ever tried to encode H.264 video, you'll know that it's a time-consuming process. While previous GTX cards sped up encoding using the GPU's CUDA cores, it resulted in increased power consumption. And so, in keeping with Nvidia's new power-saving attitude, the NVENC encoder consumes much less power, while also being four times as fast.
"If you're anything like us, then nothing gets you more excited than realistic cloth animations and individually animated strands of hair."
That means 1080p videos encode up to eight times faster than real time, depending on your chosen quality setting, so a 16-minute-long 1080p, 30fps video takes approximately 2 minutes to complete. Unfortunately, software developers need to incorporate NVENC support in their software, so at launch you're limited to using Cyberlink's Media Expresso. Support for Cyberlink PowerDirector and Arcsoft MediaConverter is promised for a later date.
One other notable improvement to the GTX 680 comes in the form of improved PhysX performance. And, if you're anything like us, then nothing gets you more excited than realistic cloth animations and individually animated strands of hair. To demonstrate the 680's improved performance, Nvidia has put together a tech demo featuring a very hairy ape in a wind tunnel. Each strand of its fur is individually animated, with PhysX processing each movement in real time.
Nvidia also put together a demo called Fracture, which features three destructible pillars. Instead of scripted animations, it uses PhysX to calculate the destruction of an object in real time. Depending on what force the pillar is struck with and taking into account the environment and any previous damage, it falls apart in an amazingly realistic way. The obvious application for this tech is in action games, where gunfire could accurately damage buildings.
The improvements to PhysX aren't just part of a tech demo either. The PC version of Gearbox Software's upcoming Borderlands 2 is set to support many PhysX enhancements. These include water that reacts accurately to a player's movements, rippling and splashing around the environment as you walk through it. Borderlands 2 also makes use of PhysX to render destruction. For example, fire a rocket launcher into the ground, and huge chunks of earth and gravel fly into the air. The resulting debris settles on the floor, where you can kick it around by walking through it.
So those are the top-line improvements to Kepler, but there's plenty more tech to get stuck into on the next page, where we take a more in-depth look at Nvidia's latest architecture. Or, if you just want to get straight to some benchmarks, head over to page three.




